States and Properties of Matter
Aluminum alloys have distinct properties. Which of the following isn't one of them?
A. Malleable
B. Ductile
C. Recycleable
D. Magnetic
D. Magnetic
Electrons involved in bonding between atoms are?
A. Closest to the nucleus
B. Positively charged
C. Inside the nucleus
D. Valence electrons
D. Valence
Which of the following is an exothermic chemical process?
Evaporation of water
Melting ice
Photosynthesis of glucose
Combustion of gasoline
Combustion of gasoline
An ion has a different number of _______ while an isotope has a different number of ________.
Electrons
Neutrons
Does neon form compounds?
No.
Which is unlikely to contain plasma?
A star
A lightning bolt
A glass of water
A neon Light
A glass of water
Refer to the Periodic Table. Which pair of atoms would most likely form an ionic bond?
Sodium and Calcium
Oxygen and Chlorine
Sodium and Oxygen
Calcium and Helium
Sodium and Oxygen
A neutral atom of silicon has how many electrons?
14
The chloride ion has the same number of electrons as a neutral atom of ___?
A. Fluorine
B. Sulfur
C. Argon
D. Bromine
Argon
Charges can be used to predict the ____
A. Neutrons in the nucleus
B. Density of an element
C. Atomic weight
D. Formulas of compounds
D. formulas
Which would slow down the dissolving of a sugar cube in water?
A. Cooling the water
B. Crushing the sugar
C. Heating the water
D. Stirring the water
cooling the water A
What type of bond are the following? H2, Cl2, NH3, CH4
Ionic, Covalent, Metallic, or polar?
Covalent
What is always true about atoms of the same element?
They contain the same number of ____________
The contain the same number of protons?
The nuclides (atoms) of I-131 and I-133 are classified as:
A. ions of the same element
B. Isomers of Xe-131 and Cs-133
C. Isotopes of the same element
D. Isotopes of Xe-131 and Cs-133
C
Name one element that Chlorine would have similar properties to
Fluorine, Bromine, Iodine, Astatine, Ts
A compound differs from a mixture in that a compound always has a:
A. homogeneous composition
B. Maximum of two components
C. Minimum of three components
D. Heterogeneous composition
A. Homogeneous
Cations are attracted to what??
Anions
Which foods cause a build-up of stomach acid. ( which are acidic?)
A. vegetables
B. Citrus
C. Dairy/egg
D. Starches
B. Citrus
Atomic masses are usually expressed as averages due to the existance of what phenomenon?
Isotopes
Generally, how do atomic masses vary throughout the periodic table?
left to right, top to bottom
Give an example of a heterogeneous mixture.
soil, anything with multiple components mixed together
What is the chemical formula of CaF2 based on IUPAC naming rules?
Calcium Fluoride
What is the correct formula for magnesium chloride?
MgCl2
Refer to the periodic table of elements. An ion of magnesium, Mg 2+ has how many electrons?
10 electrons
Why are Rubidium and Cesium similar? (tell me about valence electrons)
Both have 1 valence electron